Lathem PC3500TX - Manual (Page 12)

8 - PC3500TX Terminal Installation & User’s Guide
To power up the terminal
♦ Set the Test / Use switch to the USE position (toward the modular jacks).
♦ Plug the terminal 12VDC power supply into the power connector.
The terminal goes through the power up test, beeps and the lights flash. The display
message “TERMINAL LOCKED” remains until you communicate with the terminal
from the software.